221221205345324 has 24 divisors (see below), whose sum is σ = 399432567685200. Its totient is φ = 107136432126720.

The previous prime is 221221205345317. The next prime is 221221205345341. The reversal of 221221205345324 is 423543502122122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4852170689 + ... + 4852216280.

It is an arithmetic number, because the mean of its divisors is an integer number (16643023653550).

Almost surely, 2^{221221205345324} is an apocalyptic number.

It is an amenable number.

221221205345324 is a deficient number, since it is larger than the sum of its proper divisors (178211362339876).

221221205345324 is a wasteful number, since it uses less digits than its factorization.

221221205345324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9704387153 (or 9704387151 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 221221205345324 its reverse (423543502122122), we get a palindrome (644764707467446).

The spelling of 221221205345324 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred five million, three hundred forty-five thousand, three hundred twenty-four".